Improvement in forming locks on tin plates



VUNITED STATES ATENT ErrcE.

EMMONS MANLEY, OF MARION, NEV YORK.

Specification forming part of Leittrs Patent No. 37,629, dated February l0, 1863.

I0 all whom, it may concern:

Be it known that I, EMMoNs- MANLEY, of iWIarion, in the county of XVayne and State of New York, have invented a new and Improved Machine for Folding or Forming Locks ou Tinned Plates; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part ofthis specitication, in which- Figure l is a transverse vertical section of my invention taken in the line x a, Fig. 2; Fig. 2, a plan or top view of the same; Fig. 3, a front view of the saine, Fig. 4, a view of a lock formed on the end of a plate.

Similar letters of reference indicate corresponding parts in the several iigures.

This invention relates to a new and improved machine for the use of tinners and other workers in sheet metal, and is designed to supersede the ordinary machine for the same purpose, to wit, the bending or forming of the locks at the ends of tinned or sheet-metal plates in order to secure them together.

rIhe invention consists in having the foldingbar of the machine near one of its ends arranged in such a manner as to work on a concentric guide or bearing, and ad mit ofthe plates to be operated upon'being inserted laterally into the machine, thereby avoiding considerable difficulty and embarrassment, which attend the working of the ordinary machines in use.

The invention also consists in using, in con- 4nection with the folding-bar alluded to, two

movable jaws connected with a lever, and arranged-in such a manner and with the foldingbar as to operate in a far more advantageous manner than usual to accomplish the desired result.

To enable those skilled in the art to fully understand and construct my invention, I will v proceed to describe it.

A represents a base-plate, which has two uprights, aa', attached to it-one near each endand B is a bar, which is of square or rectangular form the greater portion of its length. One end of this bar B hasa journal, b, which is fitted in the upper part of the upright a, the center of said journal being in line with an angle or corner, c, of the bar B. The bar B, near its opposite end, has a semicircular hub, d, attached circumferentially to it, and in such a position as to be concentric with the journal b. The outer side of the hub d has a groove, e, made in it, and this groove receives a curved or semicircular bearing, f,whichis at the side of a semicircular plate, g, the latter being attached to the upright a. By this arrangement it will be seen that a bearing is obtained for the bar B at one end, which leaves said end entirely unobstructed or open for the lateral insertion or adjustment of metal plates in front of it, as will be understood by referring to Fig. 2.

C D represent two horizontal bars, the ends of which are attached, respectively, to upright bars IL /L t' t', the lower ends of the latter being attached by pivot-bolts or screws j to ledges or cleats 7c on the base-plate A, a ledge or cleat being at each end of the base-plate. To the upper surface of the bar O there is attached a plate, Z, which, when the bars C D are moved toward each other, laps over the bar D. This movement of the bars C D toward and from each other is allowed in consequence of the uprightsh'ibeing allowed to work on the bolts or screws j.

E is a lever,which is attached by a fulcrumpin, m, to a small upright, F, on the bascplate A. The back end of this lever is connected by a rod, a, to the back part of the bar B, and said lever is also connected at a short distance from its fulcrum m with the bar D by a rod, l).

To the front side of the bar D, at about its center, there is attached a pendant, G, the outer edge of which is curved longitudinally, and against which a roller, g, on the lever E, bears or works."

Between the uprights h ,at one or both ends of the machine, there is a spring, 1*.

The operation is as follows: Vhen the front end of the lever E is fully elevated, the face side ax of the bar B is in an elevated position, and the bars C D are dstended or separated to their fullest extent, or as far as they are allowed to move, the spring or springs r distending or throwing the bar D outward as the front end of thelever is raised, and the rod p at the same time drawing outward the bar O. The several parts when in this position are ready to receive the metal plate to be bent, .the latter being inserted down between the two bars OD, between the plate Z and the bar C, as indicated by the blue outline in Fig. l. The front end of the lever Eis then forced down, and the bar B,whichI term the folding-bar, has its face side LX turned down,while the bars O D,which Iterm jaws, are pressed toward each other, the bar or jaw O being moved by the rods p, the folding-bar B being moved by the rod n, and the jaw D being moved by the action of the roller g against the pendant G'. The folding-bar B bends over the plate, as indicated by the blue dotted line,while the jaws C D canse the lower edge of the plate to be sent underneath the plate Z on jaw D, thereby forming the lock or hook edge on the plate, as shown clearly in Fig. et. By this arrangement of the jaws GD and folding-bar B the desired work is accomplished by turning the vbar B onequarter of a revolution only, and by having the folding-bar B arranged, as shown, near one end with a selnicircnlar bearing, j', an open space is allowed between the angle c or lower edge ofthe 'face (V of B to admit oi' the lateral insertion ofthe plate to be bent, and the jaws GD also being arranged to move, as described, will admit ot" sheet or narrow locks being removed directly irom the machine, as the lock can be slipped backward oi'f vfrom the plate Z,

and then drawn forward and out from the machine, instead o'f being shoved out from it laterally.

Having thus described myinvention, whatI claim as new, and desire to secure by Letters Patent, is-

l. Providing the folding-bar B with asemicircular hub, d, grooved to receive a s'emicircular bearing, j', and all arranged, substanr tially as shown, tofadrnit of an open space at one end of the bar B, to allow the plate to be adjusted laterally between it and the jaw D, as herein set forth.

2. rlhe movable or adj nstable jaws C D, arranged, in connection with the lever E, as shown, to operate, as and for the purpose specified.

3. The combination of the folding-bar B, jaws C D, and lever E, all arranged for joint operation, as and for the purpose herein set forth.

EMMONS MANLEY.

Vitnesses:

C. C. HUGGiNs, CRARLns H. GURTIs. 

